A Florida town requires solar on new homes.

The city passed the law after high school student Delaney Reynolds, inspired by the laws in California, wrote to mayors in the area. “We made history [Tuesday] night,” South Miami Mayor Philip Stoddard said. “It’s not going to save the world by itself, but it’s going to get people thinking about [solar].” The 2.3-square-mile city receives an average of 5–10 building permits per year.